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Engineering Physics Jntu Model Paper{Www.Studentyogi.Com}
 

Engineering Physics Jntu Model Paper{Www.Studentyogi.Com}

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Engineering Physics Jntu Model Paper{Www.Studentyogi.Com}

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    Engineering Physics Jntu Model Paper{Www.Studentyogi.Com} Engineering Physics Jntu Model Paper{Www.Studentyogi.Com} Document Transcript

    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 1 I B.Tech Regular Examinations, May/Jun 2008 ENGINEERING PHYSICS ( Common to Civil Engineering, Mechanical Engineering, Chemical Engineering, Mechatronics, Metallurgy & Material Technology, Production Engineering, Aeronautical Engineering and Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) Explain the concept of coherence. (b) Discuss why two independent sources of light of the same wavelength cannot produce interference fringes. (c) What are the necessary conditions for obtaining interference fringes. [4+8+4] 2. (a) Explain the factors like reverberation, reverberation time, loudness and echo are a ecting the architectural acoustics. (b) How the above mentioned di culties are overcome. [10+6] 3. (a) What are ferromagnetic domains? (b) Discuss Weiss theory of ferromagnetism. (c) What are its merits and demerits? [4+8+4] 4. (a) De ne packing factor of a unit cell. (b) Show that the packing factor for simple cubic, bo dy centered and face centered lattices are 52%, 68% and 74% respectively. (c) Iron has BCC structure with atomic weight 55.85 and density 7860 kg/m3. Find the lattice constant. [4+8+4] 5. (a) Describe how population inversion is very important in laser. (b) Explain the modes of vibrations of CO2 molecule. Describe the construction and working of CO2 laser with necessary diagram. (c) Distinguish between homo junction and hetero junction semiconductor laser. [4+8+4] 6. (a) What are the points are important to mention single mo de ber? (b) Explain with a block diagram, the basic instrumentation technique adopted to explain the communication system. (c) A ber has a core refractive index of 1.44 and cladding refractive index of 1.4. Find its numerical aperture and acceptance angle. [4+8+4] 7. (a) De ne thermal capacity.
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 1 (c) Derive and discuss one dimensional lattice vibrations in solids. [4+4+8] 8. (a) What is the principle behind the TEM? (b) Explain the transmission electron microscopy. (c) Give the advantages of TEM. [4+8+4]
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 2 I B.Tech Regular Examinations, May/Jun 2008 ENGINEERING PHYSICS ( Common to Civil Engineering, Mechanical Engineering, Chemical Engineering, Mechatronics, Metallurgy & Material Technology, Production Engineering, Aeronautical Engineering and Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) De ne interference of light. (b) Describe and explain the phenomenon of interference of light. (c) Two coherent sources whose intensity ratio is 36:1 produce interference fringes. Deduce the ratio of maximum intensity to minimum intensity. [4+8+4] 2. (a) What are ultrasonic waves? (b) Write an essay on production, properties and applications of ultrasonics. (c) How Ultrasonics are used in non- destructive testing. [4+8+4] 3. (a) Write short notes on ux quantization. (b) Discuss the important applications of superconductors (c) Calculate the critical current for a wire of lead having a diameter of 1 mm at 4.2 K. Critical temperature for lead is 7.18 K and critical eld at 0 K is 6.5×104 A/m. [4+8+4] 4. (a) De ne co ordination number and atomic radius. (b) Obtain the expressions coordination number and atomic radius for SC, BCC and FCC lattices. [6+10] 5. (a) The rst line of principle series of Sodium D - Line at 5890 A0. This corre- sponds to a transition from the rst excited state to the ground state. What is the energy of electron volts of the rst excited state? (b) Discuss the application of laser in Engineering, Medical and Other elds. (c) Explain the pumping metho ds. i. Optical pumping ii. Electron excitation pumping. [4+8+4] 6. (a) Derive an expression for acceptance angle. (b) Derive brie y the di erent types of ber with neat diagram. (c) Derive the fractional index change. [4+8+4] 7. (a) Derive an expression for internal eld in dielectrics.
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 2 8. (a) What is the principle behind the TEM? (b) Explain the transmission electron microscopy. (c) Give the advantages of TEM. [4+8+4]
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 3 I B.Tech Regular Examinations, May/Jun 2008 ENGINEERING PHYSICS ( Common to Civil Engineering, Mechanical Engineering, Chemical Engineering, Mechatronics, Metallurgy & Material Technology, Production Engineering, Aeronautical Engineering and Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) What do you meant by polarization? (b) How the polarized light is di er from ordinary light? (c) Explain the mechanism behind the polarization of light. [4+6+6] 2. (a) How echo is a ecting the acoustically go od hall and mention their remedies. (b) Explain the types of noise and how these noises are controlled. [8+8] 3. (a) What is called cooper pair? (b) How cooper pairs are formed. (c) Mention the importance of co oper pair. [4+8+4] 4. (a) De ne packing factor of a unit cell. (b) Show that the packing factor for simple cubic, bo dy centered and face centered lattices are 52%, 68% and 74% respectively. (c) Iron has BCC structure with atomic weight 55.85 and density 7860 kg/m3. Find the lattice constant. [4+8+4] 5. (a) What is meant by LIDAR? (b) Give the comparison chart between the lasers Ruby, Nd-Yag, He-Ne, CO2 and Ga - As. (c) A CO2 laser source emits light at a wavelength of 9.6 m and has an output power of 10KW. How many photons are emitted in each hour by this laser while operating? [4+8+4] 6. (a) What is meant by attenuation in optical ber? (b) Explain the di erent types of attenuation. [4+12] 7. (a) What is meant by dielectric loss? What is dielectric break down? Write in detail about the various factors contributing the breakdown in dielectrics. (b) The radias of helium atom is about 0.56AU. Calculate the polarisasbility of helium and its relative permeability. The number of helium atoms in a volume of 1 m2 is 2.7 × 1025 atoms. [4+8+4]
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 3 (b) Analyze the application of nano technology in the bio elds. [8+8]
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 4 I B.Tech Regular Examinations, May/Jun 2008 ENGINEERING PHYSICS ( Common to Civil Engineering, Mechanical Engineering, Chemical Engineering, Mechatronics, Metallurgy & Material Technology, Production Engineering, Aeronautical Engineering and Automobile Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks 1. (a) What do you meant by polarization? (b) How the polarized light is di er from ordinary light? (c) Explain the mechanism behind the polarization of light. [4+6+6] 2. (a) Explain the factors like reverberation, reverberation time, loudness and echo are a ecting the architectural acoustics. (b) How the above mentioned di culties are overcome. [10+6] 3. (a) What are called magnetic materials? (b) Explain the characteristics of Para magnetic, Dia magnetic and Ferro magnetic substances with examples. [4+12] 4. (a) De ne the terms coordination number, atomic radius and packing factor. (b) Determine the coordination number, atomic radius and packing factor for BCC and FCC lattices. [6+10] 5. (a) Write a short note about laser. (b) Discuss the various methods involved to get population inversion. (c) Explain the following pumping methods. i. Optical pumping ii. Direct electron excitation iii. Inelastic atom-atom collision. iv. Direct electron excitation. [4+8+4] 6. (a) What are the advantages between optical ber communication and ordinary communication? (b) Explain the ber optic communication brie y. (c) A silica optical ber has a core of refractive index of 1.563 and cladding re- fractive index of 1.498. Determine Acceptance angle, Numerical aperture and critical angle. [4+8+4] 7. (a) Discuss two dimensional lattice vibrations in solids. (b) Explain the mechanism of thermal conduction.
    • www.studentyogi.com www.studentyogi.com Code No: 07A1BS03 Set No. 4 (c) Mention the changes that occur in the heat conduction through metals. [6+6+4] 8. (a) Discuss the chemical properties of nano materials. (b) Analyze the application of nano technology in the bio elds. [8+8]